feat(frontend): add shadcn ui primitives and compatibility bridge

vite-frontend/src/components/ui/button.tsx

@@ -0,0 +1,52 @@
+import * as React from "react";
+import { Slot } from "@radix-ui/react-slot";
+import { cva, type VariantProps } from "class-variance-authority";
+
+import { cn } from "@/lib/utils";
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center whitespace-nowrap rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50",
+  {
+    variants: {
+      variant: {
+        default: "bg-primary text-primary-foreground hover:bg-primary/90",
+        destructive: "bg-danger text-white hover:bg-danger/90",
+        outline: "border border-input bg-background hover:bg-accent hover:text-accent-foreground",
+        secondary: "bg-secondary text-secondary-foreground hover:bg-secondary/80",
+        ghost: "hover:bg-accent hover:text-accent-foreground",
+        link: "text-primary underline-offset-4 hover:underline",
+        light: "bg-transparent hover:bg-default-100 dark:hover:bg-default-200/40",
+        flat: "bg-default-100 text-foreground hover:bg-default-200 dark:bg-default-100/40",
+      },
+      size: {
+        default: "h-9 px-4 py-2",
+        sm: "h-8 rounded-md px-3 text-xs",
+        lg: "h-10 rounded-md px-8",
+        icon: "h-9 w-9",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  },
+);
+
+type ButtonProps = React.ComponentProps<"button"> &
+  VariantProps<typeof buttonVariants> & {
+    asChild?: boolean;
+  };
+
+function Button({ asChild = false, className, size, variant, ...props }: ButtonProps) {
+  const Comp = asChild ? Slot : "button";
+
+  return (
+    <Comp
+      className={cn(buttonVariants({ className, size, variant }))}
+      data-slot="button"
+      {...props}
+    />
+  );
+}
+
+export { Button, buttonVariants };